Journal Impact

Tools to Evaluate Publishers

Ulrichsweb Global Serials Directory
Provides bibliographic information on serials published throughout the world. Covers all subjects, and includes publications that are published regularly or irregularly and are circulated free of charge or by paid subscription.
Web of Science
Web of Science provides indexing, full text linking, and citation tracking for books and articles from vetted, high quality sources in all disciplines (arts and humanities, social sciences, business and sciences), as well as author, journal, and book metrics. Cited Reference Search includes books, artwork, and other cited works. Analyze results identifies frequent authors, funders, universities, and journals for a search or topic. Now includes Book Citation Index.
WorldCat (FirstSearch)
OCLC catalog of books, web resources, and other material worldwide

Journal impact factor (IF/JIF) measures...

...the importance, or rank, of a journal by measuring the number of times its published articles are cited.

TOOLS:

InCites^TM Journal Citation Reports^® (JCR) [see box below]

Google Scholar Metrics
Top Publications list including Google Scholar's h-5 index and h-5 median metrics for journals. Click on the linked metrics for a description of each metric.
Eigenfactor.org [Public Access]
Gives Eigenfactor Score & Article Influence Score for journals, as well as more information about the Eigenfactor ranking & mapping of journals and scholarly information. The Eigenfactor score adjusts for differences across disciplines and is also provided in JCR.

Journal Citation Reports® (JCR)

InCitesTM Journal Citation Reports® (JCR) database (Clarivate Analytics) illustrates journal impact factor (IF/JIF). It is considered the oldest, and most traditional measure of journal quality to this day, with a larger focus on STEM, and Western European and North American content. Purchased in 2016 by Clarivate Analytics, a company that claims to operate completely independently of mainstream publishers. More info in below box.

The training video below provides a helpful, concise overview on how to use JCR to find journal impact factors, Q1 journals, and other journal-related metrics:

Journal Citation Reports (JCR)
Journal Citation Reports® contains data about more than 8,000 journals in science and technology and more than 2,600 journals in the social sciences. Identifies number of articles published in the journal, number of citations to that journal from articles published, and Impact Factor calculated from the selected years data.

Journal Citation Reports Quick Reference Cards
Quick and easy 4 page PDF document on all you need to know on how to use JCR including definitions of the various metrics and database screenshots.
JCR Guide by Clarivate Analytics
Training videos and other resources from Clarivate Analytics.